If you put the code in your baseclass of your editbox, textbox, etc. then it has no dependencies on a menu definition:

DEFINE POPUP shortcut SHORTCUT RELATIVE FROM MROW(),MCOL()
DEFINE BAR _med_cut OF shortcut PROMPT "Cu\<t" ;
	KEY CTRL+X, "Ctrl+X" ;
	MESSAGE "Removes the selection and places it onto the Clipboard"
DEFINE BAR _med_copy OF shortcut PROMPT "\<Copy" ;
	KEY CTRL+C, "Ctrl+C" ;
	MESSAGE "Copies the selection onto the Clipboard"
DEFINE BAR _med_paste OF shortcut PROMPT "\<Paste" ;
	KEY CTRL+V, "Ctrl+V" ;
	MESSAGE "Pastes the contents of the Clipboard"
DEFINE BAR _med_clear OF shortcut PROMPT "Cle\<ar" ;
	MESSAGE "Removes the selection and does not place it onto the Clipboard"
DEFINE BAR _med_slcta OF shortcut PROMPT "Se\<lect All" ;
	KEY CTRL+A, "Ctrl+A" ;
	MESSAGE "Selects all text or items in the current window"

ACTIVATE POPUP shortcut